Hi Lisa,
I am also facing similar issue with CCS5.1. I had checked for update using CCS but haven't but CCS tells me that there are no update related to msp430, I need to install msp430 compiler with version 4.0.2 on my system to compile my software.
My team members can able to update the same using CCS but in my case its not happening.
Can you help me.
Sachin